EP0344534B1 - Verfahren zur Qualitätsüberwachung eines Digitalsignals in Abschnitten einer Übertragungsstrecke - Google Patents

Verfahren zur Qualitätsüberwachung eines Digitalsignals in Abschnitten einer Übertragungsstrecke Download PDF

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Publication number
EP0344534B1
EP0344534B1 EP89108980A EP89108980A EP0344534B1 EP 0344534 B1 EP0344534 B1 EP 0344534B1 EP 89108980 A EP89108980 A EP 89108980A EP 89108980 A EP89108980 A EP 89108980A EP 0344534 B1 EP0344534 B1 EP 0344534B1
Authority
EP
European Patent Office
Prior art keywords
digital signal
code word
bip
stm
auxiliary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89108980A
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German (de)
English (en)
French (fr)
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EP0344534A1 (de
Inventor
Wolfgang Dipl.-Ing. Appelmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
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Siemens AG
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Publication date
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Priority to AT89108980T priority Critical patent/ATE93672T1/de
Publication of EP0344534A1 publication Critical patent/EP0344534A1/de
Application granted granted Critical
Publication of EP0344534B1 publication Critical patent/EP0344534B1/de
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/14—Monitoring arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0064—Admission Control
    • H04J2203/0067—Resource management and allocation
    • H04J2203/0071—Monitoring

Definitions

  • Quality monitoring includes, on the one hand, the detection and reporting of defects in the digital signal or its absence and, on the other hand, the determination of long-term changes in the transmission properties of the routes.
  • British patent GB-A-1 401 261 describes a multiplex data transmission system in which disturbed bits are transmitted by intermediate stations without correction in order to be able to carry out error analysis and alarming.
  • a synchronous digital signal is furthermore from the CCITT recommendation designs G.70X, G.70Y and G.70Z, which have led to the CCITT recommendations G.707, 708 and 709 (CCITT-Blue Book Volume III, Fascicle III.4) -Hierarchy known.
  • Digital signals of the lowest hierarchical level have a bit rate of 155.52 Mbit / s and a pulse frame, which is called the synchronous transport module STM-1. This consists of a section overhead, an administration unit and an administration unit pointer unit pointer).
  • a virtual container can be inserted into the administrative unit, the beginning of which indicates the administrative unit pointer.
  • the virtual container in turn consists of a path frame header (path overhead) and a container in which a 139.264 Mbit / s signal is accommodated.
  • This virtual container contains 2349 bytes of 8 bits each.
  • a BIP-8 code word (bit-interleaved-parity-8 code) for parity monitoring, in which it is recorded whether the sum of the logical states of one bit position of every 2349 byte is even or odd , (CCITT, Blue Book, Volume III, Fascicle III.4 (1989), page 120, Rec. G.708, 5.2.1.6).
  • This BIP-8 code word is transmitted unchanged from the digital signal source to the digital signal sink in the case of trouble-free operation.
  • a standardized B1 byte is newly formed in each regenerator. This monitoring therefore only extends from regenerator to regenerator.
  • a standardized B2 byte is formed at least at the places where the pointer content is reset, which is done in higher multiplex devices and possibly also in line terminals.
  • the invention is based on the object of specifying a monitoring method which detects sections between digital signal distributors and between the digital signal source or the digital signal sink and the adjacent digital signal distributor.
  • Fig. 1 shows a centrally controlled network replacement switching system with a network management center 1, with regional centers 2-4, with a digital signal source 5, with digital signal distributors 6-13, with a digital signal sink 14, with a transmission link 15, with a fault point 16 and with an alternative route 17.
  • a digital signal is transmitted from the digital signal source 5 to the digital signal sink 14 via the transmission link 15. Between the digital signal source 5 and the impurity 16, the digital signal is without defects.
  • the digital signal distributors 6-8 report no malfunction to the regional center 2.
  • the digital signal distributors 9-13 located after the malfunction 16 recognize the malfunction and report this to the regional centers 3 and 4.
  • the network management center 1 initiates the switching of the Alternative route 17.
  • the path frame header VC-4 POH contains bytes J1, B3, C2, E1, F2 and H4, which according to CCITT are already intended for a specific use. However, bytes Z3, Z4 and Z5 are still freely available.
  • Fig. 3 all 2349 bytes of the virtual container VC-4 are shown one below the other.
  • the top byte is a standardized J1 byte, which is of no interest here; otherwise bytes B3, Z4 and Z5 are highlighted.
  • Each digital signal distributor 6 to 13 in FIG. 1 forms a new additional BIP-8 code word, compares this with the received one, reports a possible error or the current state to its regional headquarters 2 to 4 and feeds an additional BIP-8 Code word B4 and a correction code word for the outgoing line into the Z4 and Z5 time slots.
  • the network management center can record the current situation on the basis of the messages from the digital signal distributors 2 to 13. When storing the messages, it can also provide quality information over longer periods of time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Small-Scale Networks (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
EP89108980A 1988-06-01 1989-05-18 Verfahren zur Qualitätsüberwachung eines Digitalsignals in Abschnitten einer Übertragungsstrecke Expired - Lifetime EP0344534B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89108980T ATE93672T1 (de) 1988-06-01 1989-05-18 Verfahren zur qualitaetsueberwachung eines digitalsignals in abschnitten einer uebertragungsstrecke.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3818716 1988-06-01
DE3818716 1988-06-01

Publications (2)

Publication Number Publication Date
EP0344534A1 EP0344534A1 (de) 1989-12-06
EP0344534B1 true EP0344534B1 (de) 1993-08-25

Family

ID=6355663

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89108980A Expired - Lifetime EP0344534B1 (de) 1988-06-01 1989-05-18 Verfahren zur Qualitätsüberwachung eines Digitalsignals in Abschnitten einer Übertragungsstrecke

Country Status (9)

Country Link
US (1) US4964112A (ja)
EP (1) EP0344534B1 (ja)
JP (1) JPH0226428A (ja)
AT (1) ATE93672T1 (ja)
AU (1) AU590489B1 (ja)
BR (1) BR8902516A (ja)
DE (1) DE58905360D1 (ja)
ES (1) ES2042873T3 (ja)
NO (1) NO892206L (ja)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE147213T1 (de) * 1990-10-22 1997-01-15 Siemens Ag Verfahren und anordnung zur übertragung von synchronisiersignalen in einem netzwerk der synchron-digital-hierarchie
US5271001A (en) * 1990-10-31 1993-12-14 Nec Corporation Synchronous terminal station system
US5412709A (en) * 1992-06-24 1995-05-02 Charter Leasing Corporation Digital telephone station line controller
GB9218011D0 (en) * 1992-08-25 1992-10-14 Northern Telecom Ltd High availability leased lines
JPH06125331A (ja) * 1992-10-12 1994-05-06 Nec Corp ディジタル回線終端装置
FI98170C (fi) * 1992-12-02 1997-04-25 Nokia Telecommunications Oy Menetelmä synkronisessa digitaalisessa tietoliikennejärjestelmässä käytettävän verkkoelementin testaamiseksi
JP2897099B2 (ja) * 1993-09-20 1999-05-31 富士通株式会社 タンデム・コネクション・メインテナンス方式
DE4342559A1 (de) * 1993-12-14 1995-06-22 Kommunikations Elektronik Verfahren zur digitalen Datenübertragung
US5784359A (en) * 1996-06-28 1998-07-21 Mci Communications Corporation System and method for unreported trouble isolation
US6072777A (en) * 1996-06-28 2000-06-06 Mci Communications Corporation System and method for unreported root cause analysis
US5768255A (en) * 1996-06-28 1998-06-16 Mci Communications Corporation System and method for monitoring point identification
US5787074A (en) * 1996-06-28 1998-07-28 Mci Communications Corporation System and method for monitoring point activation
US5864662A (en) * 1996-06-28 1999-01-26 Mci Communication Corporation System and method for reported root cause analysis
US5796723A (en) * 1996-06-28 1998-08-18 Mci Communications Corporation System and method for end-to-end threshold setting
EP0986226B1 (en) * 1998-09-11 2007-01-17 Hitachi, Ltd. Ip packet communication apparatus
JP3388464B2 (ja) 1999-11-04 2003-03-24 日本電気株式会社 誤り訂正を用いた光伝送システム及びそれに用いるパフォーマンスモニタ方式
JP2001186061A (ja) * 1999-12-24 2001-07-06 Nec Corp 伝送品質監視システムおよび伝送品質の監視方法
US6975657B1 (en) * 2000-09-21 2005-12-13 Nortel Networks Limited System and method for generation of large concatenated payloads
JPWO2002056513A1 (ja) * 2000-12-27 2004-05-20 富士通株式会社 パスエラー監視方法及びその装置
RU2457538C1 (ru) * 2011-06-27 2012-07-27 Федеральное государственное унитарное предприятие "18 Центральный научно-исследовательский институт" Министерства обороны Российской Федерации Устройство технического контроля цифровых сигналов

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1401261A (en) * 1972-01-13 1975-07-16 Siemens Ag Data transmission systems
DE2556079C2 (de) * 1975-12-12 1977-10-27 Siemens AG, 1000 Berlin und 8000 München Verfahren zur Überwachung einzelner Übertragungsabschnitte fur digitale Signale und Anordnung zur Durchführung des Verfahrens
FR2535135B1 (fr) * 1982-10-21 1988-03-25 Servel Michel Systeme de synchronisation de multiplex numeriques de paquets
CA1205561A (en) * 1983-03-11 1986-06-03 Kiichi Yamashita Method of searching fault locations in digital transmission line
DE3401685A1 (de) * 1984-01-19 1985-07-25 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren zur fehlerortung
JPS61139134A (ja) * 1984-12-10 1986-06-26 Nec Corp ディジタル多重化装置のモニタリング方式
DE3619371A1 (de) * 1986-06-09 1987-12-10 Siemens Ag Verfahren zum multiplexen und demultiplexen plesiochroner digitalsignale
DE3620835A1 (de) * 1986-06-21 1987-12-23 Philips Patentverwaltung Verfahren zur ueberwachung eines digitalen, hierarchisch gegliederten nachrichtenuebertragungsnetzes
AR241357A1 (es) * 1986-06-27 1992-05-29 Siemens Ag Disposicion de circuito para vigilar la transmision de informacion en vias de enlace tetrafilares conmutadas.

Also Published As

Publication number Publication date
NO892206L (no) 1989-12-04
EP0344534A1 (de) 1989-12-06
DE58905360D1 (de) 1993-09-30
ATE93672T1 (de) 1993-09-15
NO892206D0 (no) 1989-05-31
BR8902516A (pt) 1990-01-23
AU590489B1 (en) 1989-11-02
ES2042873T3 (es) 1993-12-16
US4964112A (en) 1990-10-16
JPH0226428A (ja) 1990-01-29

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